Guys, my PL30 right side died. Just 5 months of use. Anyone knows how to claim for warranty?

E10 and E30 are the latest SM dynamic driver IEMs it replaces PL21 and PL30 respectively although you can get these two older models at lower prices. PL50 is a Balanced armature drived IEM and nearing the end of its shelf life. There are better, newer and cheaper BA driver IEM namely FEELS Pro 900.

Between the three, PL50 has the best clarity (not too far ahead) and comfort BUT severely lacking Bass because of the BA driver physical properties. In the end its a toss up between E10 and E30 but E30 for best comfort, designed to wear over the ear not down like the E10.